Rollinq



(No Modell 2 Sheets-Sheet 1.

J. J.R0BERTS.

" ROLLINGMILL.

Nmzvezm Patented May 1,1883.

` gm I (No Model.) 2 Sheets-Shet 2.

. J. J. ROBERTS. RQLLING MILL.

Pa'ented` May 1,

atte/@5,1

i UNITED' .lons J. trousers, or Resume, PENNSYLVANIA.

Y I. .ricittnaeflunur."

".srnexrzoarrolrfommgparty-of .naar 116.276,62, dated-my 1, ieee.'

` Appnuuanmse nwmb'enaiaas. maman i r such inodication ot' thevconstruction ofithe r rollstheret'or as will very materially reduce-thecost o't' thesamel "The objectof my invention is to improve the productof the `mill, increa`se its output,`

decrease the capital r invested in rolls, und give increased strengthtothe same, decreasing the liability to accidents in operating the same.I

., attain these objects by the construction of the rolls in-the mannerillustrated in theaccompanying drawings, in which similar letters refertosimilar parts throughout the drawings forming part of thisspecitication- Y Figure 1, Sheet l; representing a' front elevaton of' acomplete merchant-bar mill for iron or steel, showing my Vimproved rollsand housings on the left-hand side. Fig. 2Sheet 1, represents a set -ot'rolls for a three-high mill in accordance with myimprovement. Fig. 3,Sheet 1, is an end view of the same. i Fig. 4, Sheet 2, represents a setof rolls for square bars, preferably used in connection with myimprovement. Fig. 5, Sheet 2, is an end ele vation ofa. housing adaptedto my improvenient. Fig. 6, Sheet 2, is affront elevation of the same.`Fig. 7 Sheet 2, plan, side, and front elevation of rider orbearing-'boxes used in the housings. Fig. 8, Sheet 2, representstheadjustinglreys. Fig.9, Sheet 2, represents the side guides usedinzcoinbiuation with the improved rolls. I

v A represents the housngshoe, adapted to tit the feet'of: the housingsmounted thereon, and is provided with the usual' longitudinalholding-down-bolt recess, A', in which'the bolt- ,heads slide. Brepresents the housings for the rolls; B', thenut-boss; B, the housing-fi screw; B3inclined mortises inthe legs for Vthe keys F, and B" housingsfor the driving-pin-l ions; B, caps, and B screws'for. sameu Grepresents the usual fore plate, and D the ordinary side guides used Ainrolling metal.

place by set-screws F'. g represents the ordi- .the same.

represents the seat forthe lower roll, und E the riders for the middleand top rolls. These are' provided with a. key-groove, E, corre--spending with the mortise B3 in the housinglegs. Fare'adjusting-keys-one broad and ingflegs in thel mortises B", and aresecured in nurythree-high roughng-rolls. laV represents an ordinary set'ot' threehigh square-bar tinisliin rolls,and J represents my improvedstep at-bar rolls adapted to a three-high mill. K represents'a bar ofmetal passing through -the several series ot' rolls and emerging as aiinished tlat bar from my improved rolls in one .one narrow-passingentirely across the hous- Y continuous operation. L are the ordinarycoupling-boxes; IVI, the driving-pinions. 1 y

1t is well. known to experts in rolling-mills that rolls for flats, fromthe manner ot' their construction, are more liableto breakage andaccidents of every description than any oth- .ers of the set. l`It'isalso well`.known that to manufacture all of the marketable sizes of tlatiron usually kept in stock requires la multi-V plicity ot' rolls,usually amounting to tons ot Itis also well known that to forni Athevarious sizes it is common to throw the rolls ont of horizontal level,and thus put a greatstrain upon the necks of the rolls and eringclatter;` also, that after wear, the space ,between the.jcollars andseats becoming enlarged,-it is not an unusual occurrence` for the ,barto catch while passing.through, and either split eti' the collar,spoilingthe roll, or wind-` ing thereon to break the same'.v K

My system ,of rolls abolishes all of the above defects of the systemnon;r in n se. Preferably the'roughing and squaring-np rolls .are runfaceto tace',.with the grooves equally divided between them. Theiralignment lis therefore direct from the pinions, and my step-rollshaving their bearings rigidly adjustable bythe keys IF, their center.horizontal-line will agree with tli'e'v other'sets of rolls.V Thehousings are `the coupling-boxes uniting the same, the wabbling'ot whichatv times creates an overpow-y provided Iwith the' usual fore and back'plates,

and upon the fore plates are mounted the usual roo'.,

side guides, so arrangedrelative to the'sze-of bar desiredthat the sameshall be passed through the step-opening between the rollev adaptedt0form said size of bar, iin this l'le-4 i l two extreme diameters.

2 y v f I 276,029

spect not ditlering from present practice in small mills. 1in a set ofstep-rolls constructed in accordance with my improvement, I lprefer tohave them, fora merchant-mill, twenty-four inches between the necks, teninches diam'- eter at large end, and eight and one-quarter inches at thesinall'eild,necks live and one-halt' inches diameter und six incheslong. Ou'rolls of the above size I have eight risers and nine steps ortreads equally divided between the The treads or steps vary from threeto two and one-half inches in width. Mysystem is, however, all mills,the only dilference being that for shorter rolls there will be fewersteps, and more thail one set ot` rolls will be. required.

o In operation the billet is first passed through the roughingrolls, thegrooves selected beiilg those fitting it for the desired ing-up rolls,aild from tllenl to the steprolls, where it is redllced to a llat bar.This operationmay be continuous, as showilA in Fig. 1, Sheet 1, in whichK represents the billet, en-

t tering the rougllillg-rolls 'at the`rigllt` aild v lilaliipulatiollot' the key F,

emerging on tlievleft fron/i a finished flat bar.'

It will be noticed thatl have the coupling boxes placed directly upoiithe necks of the rolls, withoilt the intervention of the Vusual spindle.In this way the mill becoliies ilioie the upper step-rolls `compact alldbetter adapted to do good work. `lt` preferred', the spindles may beused with double coupling-boxes, as at present.

l lilid in practical use, the corners ot' the bar beilig filled out'inthe square-tinisliilig rolls, that in its reduction loailatbar in thepassage through the step-rolls tlieedge of the bar remains full aildsquare. As usually arranged, I place my step-rolls in the liousillgs atsuch distance from center to center as ill leave a space ot one-fourthot' ail incll between the faces of the rolls at their largest diameter.This space may be reduced or enlarged by a which raises or the positionsof as the keys are lowers and rigidly maintains the rolls relative toeach other applicable' to o pass in the squari driven out or in. Ineither position the setscrews F' are tightened upon `them and they 'aresecurely retained, as desired.

Rolls constructed in accordance with illy system may be lilore rapidlyfinished in the lathe aiid do .ilot require-the same degree ol' skill toproduce iis the present flat-bar rolls. The rolls under my system aremuch stronger for the same diameter than under the present system ofcollars and recesses in opposite rolls, which often reduces the body ofthe roll Yto aless diameter than the necks of the saine.

As before remarked, inyinvention will make a great reductioil in theplant required toproduce bar-iron. Theregnlar variation in the steps ofthe rolls, with the facility for increasl ing or diminishing the spaceby the keys,as described, gives superior advail tages to the lnanilfacturer in the production ot odd sizes of bars. The repairs are simple,heilig confined to a straight surface, and the rolls muy be used formany years before they would bethrown to one side for wantoi strength,whereas mider the present; system the rolls are soon worn out andrendered nnlit by reason otl weakness tn be further reduced in diameterby re-turuing on the lathe.

I ani aware that keys ior raising alid re. taining the riders oflhousing-rolls, as shown in Figs. 5, 6, and 8, are not new; but I givepreference to said nlode ot' adjustment as the simplest and niostlreliable.

Having described iilyiniprovenlent, shown the conslrnciion, andrecited-the advantages ot the adoption ot' the same, Idesire to secureby Letters Patent the following claim:

As a new device for the lilanutactnre of inerchant-bar ill iron orsteel, a stepped roll void of collars,.constructed as shown anddescribed, adapted to be used ill roll-housings in sets of two, three,or more high, substantially as and for the purpose specified. v

y JOHN J. ROBERTS. Witnesses:

LEWIS REHR, U. W. FEW.

